well,. if you leave it out in the sun a long time it will fade lighter LOL
I am also sure adding some bleach to it will speed this process up, but then will take a while to get rid of the bleach odor!(good thing its winter and you have MONTHS to air it out if you wish to try this)


spray painting and other things will also add odor to it, so heads up, I think you would be better off with INK DYE over paints too!
it will be more absorbed into materials over just coating them!

now cheaper things I have done that worked well for me,
that I I have done to get both rid of scent and a more natural looking blind is
I have made large mud puddles, mix well so all water is muddy, and placed the blind in the muddy water, on every side and top
and then let it dry in the sun
most of the dirt then sticks to the blind material and adds a more natural look IMO
in places it rains often, well, it won't last long, but in a dry place it should last a while

all depends too maybe on how long you plan to leave the blind set up
, as in set up every hunt or a few days in a row
or do you wish to leave it out for weeks or so?/

Other wise I would agree camo netting might be a better option than trying to paint or DYE it another color

a sits a LOT easier to make a LIGHT color darker, than a dark color lighter!

and just a FYI< they do sell blinds in colors lighter to blend into where your at saving you a lot of time and effort,and maybe even costs, as have to buy materials and your time, to TRY and change this one?